Jim and Chris,
I followed this thread with much interest because I have a similar question.
I am working on a project in Final Cut; it is DV footage so the screen aspect ratio is 720 x 480. I imported some footage into AE CS3, want to do some work on it, and then export it back into FC to combine with other footage. Because of the square/non-square pixel aspect ratio situation, the image is stretched horizontally in AE. (This is particularly disconcerting because not only is it adding 30 pounds to the modern dancer on the screen, but that dancer happens to be me!)
As per your advice, Chris, I read about interpreting footage and comp settings in AE help. It seems to me that in my situation I don’t want to change the settings, since I will be sending the footage back to FC, but I do want to view it correctly while in AE (if for no other reason than to quell my ego). So I am thinking that all I need to do is to toggle the aspect ratio correction button at the bottom of the composition panel. Do you agree? Should I toggle back before I render?
Thank you.
Victoria